Apparently, there isn't a great deal of difference between theoretical physics and higher mathematics. H. B. G. Casimir, the Dutch physicist once said, “In order to avoid confusion, I do not call a theoretical physicist a mathematician. To do so was - and to a certain extent still is - common practice in England.” And Einstein once half-jokingly remarked, “physicists call me a mathematician, and mathematicians call me a physicist.”

Shortly after WWII, an American airman had the opportunity to interview a resident of northern Korea (where some suspect that the Japan may have attempted to develop the atomic bomb). When they discussed the Korean's background and education he said he studied in Paris for two years, spent fourteen years in the United States, and had attended the University of California. He also said he had “studied mathematics in Germany under [Albert] Einstein."

I'm not sure what my question is, but any comments would be greatly appreciated.